greater black-backed gull大黑背鸥
Lesser Black-backed Gull小黑背鸥
great black-backed gull大黑背鸥
Larus fuscus Lesser Black-backed Gull小黑背鸥
N（名词） either of two common black-and-white European coastal gulls, Larus fuscus (lesser black-backed gull) and L. marinus (great black-backed gull) 黑背鸥